464 



2579. The fourth lumbar vertebra. 



As the rudimental pelvic bones are usually suspended to this vertebra, it may be regarded 

 as a sacral vertebra. 



2580. The first caudal (thirtieth trunk) vertebra. 



There are a pair of surfaces at the under part of the centrum, indicating that hsemapo- 

 physes were attached to it. 



2581. The second caudal vertebra. 



2582. The third caudal vertebra. 



2583. The fourth caudal vertebra. 



2584. The fifth caudal vertebra. 



2585. The sixth caudal vertebra. 



2586. The seventh caudal vertebra. 



2587. The eighth caudal vertebra. 



2588. The ninth caudal vertebra. 



2589. The tenth caudal vertebra. 



2590. The eleventh caudal vertebra. 



2591. The twelfth caudal vertebra. 



2592. The thirteenth caudal vertebra. 



2593. The fourteenth caudal vertebra. 2594. The fifteenth caudal vertebra. 



2595. The sixteenth caudal vertebra. 



2596. The seventeenth caudal vertebra. 



2597. The eighteenth caudal vertebra. 2598. The nineteenth caudal vertebra. 



2599. The twentieth caudal vertebra. 



2600. The ribs of the right side. 



They are numbered consecutively from 1 to 18: the first rib is remarkable for the long 

 oblique process from the under part of the neck, and for a shorter process terminated by a 

 rough articular surface, as for a cartilage, from the inner border, two inches from the extre- 

 mity to which the cartilaginous hsemapophysis was attached. 



